You may also consider a McCormack. I'm driving my SL3s with a McCormack DNA 1/B. While I can't compare the sound to the Parasound, I can say it is most musical to my ears, runs reasonably cool, and has dual binding posts at the rear for your biwire setup.
I've seen used DNA 1/As, DNA 1 Monoblocks, and even the odd DNA 2 in your price range.
I've seen used DNA 1/As, DNA 1 Monoblocks, and even the odd DNA 2 in your price range.